Brisbane Lagoon Watershed Sea Level Rise Adaptation Plan Project Advisory Committee
June 25, 2026
Welcome Back Project Advisory Committee!
• Association of Ramaytush Ohlone
• Baylands Development Inc.
• BCDC
• California High Speed Rail Authority
• Caltrain – Peninsula Corridors Joint Powers Board
• Caltrans D4
• OneShoreline
• San Mateo County Department of Emergency Management
• Sierra Point Owners Association
Project Advisory Committee Role
• Provide feedback on planning process – PAC Meeting 1
• Review comments from the public – PAC Meeting 2
• Guide implementation of proposed activities – PAC Meeting 3 • PAC #4 Goal – provide input on evaluation of proposed (3) alternatives, review draft Table of Contents of Report
Agenda
• Project Overview and Timeline
• Photo Competition Winners
• Draft Report Table of Contents
• Review of Proposed Alternatives
• Feedback from Community Meeting
• Criteria Based Evaluation
• Input and Feedback
Project
Overview
The goal of the project is to develop and
adopt a Brisbane Lagoon Watershed Sea
Level Rise Adaptation Plan (Plan).
The Plan will identify solutions that:
• Protect Brisbane residents and
Highway 101 from flooding impacts
related to climate change
• Enhance lagoon resilience to sea level
rise, while supporting natural systems
• Improve ecological function and habitat
continuity
• Explore opportunities to improve
existing public access
Project Timeline
Art Contest
Community Outreach - Art Contest Winners
Most Awe Inspiring Most Original Youth
DRAFT REPORT
TABLE OF CONTENTS
Table of Contents - DRAFT
1. Executive Summary
2. Introduction
3. Existing Conditions
4. Climate Change Threats
5. Hydrologic Analyses
6. Hydraulic Analyses
7. Community Engagement
8. Adaptation Measures Considered
9. Proposed Adaptation Alternatives
10. Criteria Based Evaluation
11. Implementation Roadmap and Next Steps
Alternatives
TO ADDRESS RISING LAGOON SURFACE WATER ELEVATION
Flood Mitigation Alternatives
1. Do Nothing 2. Manage Bay Water 3. Raise Lagoon Edge 4. Pump Station Do Nothing
Do Nothing
Marsh Habitat AS SEA LEVELS RISE, MARSH HABITATS
WILL MIGRATE UP IN ELEVATION
TRANSITION MARSH WILL DROWN
OUT OVER TIME AS LOW MARSH AND
HIGH MARSH EXPAND UPLAND
Manage Bay Waters
ADD
TIDE GATE
INCORPORATE
ECOLOGICAL ARMORING
SLOW DROWNING OF
EXISTING WETLAND
Manage Bay Waters
Open and shut tide
elevations can be
managed
https://www.youtube.com/watch?v=cW300UkNCQo
Raise Lagoon Edge
RAISE
ROADWAY
NATURALIZED EDGE +
LAGOON BEACH
WETLAND
ENHANCEMENT
Raise Lagoon Edge
Pump Station
CLOSE CULVERT,
INSTALL PUMP STATION
INCORPORATE
ECOLOGICAL ARMORING
Pump Station
Community Feedback
Areas of Concern Not Addressed by Alternatives
• Water quality contamination from landfill
• Contaminated soils
• Subsidence
• Groundwater
• Sediment buildup in the lagoon from stormwater runoff • Upstream watershed
• Quarry silt
• Protection of habitat
Comments/Concerns
• Why dredging is not recommended
• Changing salinity
• Not enough community input
• Tide gate is needed
• Excited to see benefits to public access
• Concern of lack of CEQA in planning process
• General dislike of the pump
• Help understand why the City should spend $5 or $50 million, and what we get out of it
Criteria Based
Evaluation
Criteria
Ecological Benefit
Opportunities
Permitting/
Design Duration
Benefit to Existing
Public Access
Cost
Legend
Low
Habitat Benefit
Medium
Habitat Benefit
High
Habitat Benefit
0-5 years
5-10 years
>10 years
<$5m
project costs
$5m - $15m
project costs
>$15m
Project costs
Low Public
Access Benefit
Medium Public
Access Benefit
High Public
Access Benefit
Ecological Benefit
Opportunity
Permitting/
Design Duration
Existing
Public Access
Cost of Flood
Mitigation
Evaluation of Flood Mitigation Measures - DRAFT
Discussion